Remade and extended the app using React

1 files changed, 30 insertions, 0 deletions

diff --git a/src/lib/util.ts b/src/lib/util.ts
new file mode 100644
index 0000000..1b000c0
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+++ b/src/lib/util.ts
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+/**

+ * Converts time in seconds to HH:mm format.

+ * @param time Time to convert in seconds.

+ */

+export function secondsToTimeString(time: number): string {

+  const h = Math.floor(time / 3600);

+  const m = Math.floor((time % 3600) / 60);

+

+  return `${h < 10 ? `0${h}` : h}:${m < 10 ? `0${m}` : m}`;

+}

+

+/**

+ * Calculates distance between two geographical points.

+ * @param latlng1 Coordinates of the first point.

+ * @param latlng2 Coordinates of the second point.

+ */

+export function distanceBetween(latlng1: number[], latlng2: number[]): number {

+  const R = 6371000;

+  const rad = Math.PI / 180;

+  const lat1 = latlng1[0] * rad;

+  const lat2 = latlng2[0] * rad;

+  const sinDLat = Math.sin(((latlng2[0] - latlng1[0]) * rad) / 2);

+  const sinDLon = Math.sin(((latlng2[1] - latlng1[1]) * rad) / 2);

+  const a = sinDLat * sinDLat + Math.cos(lat1) * Math.cos(lat2) * sinDLon * sinDLon;

+  const c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));

+

+  return R * c;

+}

+

+export default { secondsToTimeString, distanceBetween };